Unable to define an optional DateOnly field in blazor EditForm using InputDate component

[nvmkpk]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

I am trying to bind a InputDate component to a nullable DateOnly property. When I click on the submit button, I see a validation message The value '' is not valid for 'Date'

Expected Behavior

Form should be submitted without any validation errors.

Steps To Reproduce

1. Clone the project at https://github.com/nvmkpk/BlazorAppRepro1
2. Run the project
3. Click on Counter link on the left
4. Click on Click me button
5. Observe the validation error message

Exceptions (if any)

None

.NET Version

8.0.100

Anything else?

This only happens when not using any of the interactive modes. The form post sends empty string for the date field that cannot be parsed to a valid date on the server side.

Thanks for contacting us.

We're moving this issue to the .NET 9 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

[mxmissile]

What's the current workaround for this?

This is odd, it behaves as expected with @rendermode InteractiveServer, however static SSR I get The value '' is not valid.

repro repository: https://github.com/mxmissile/ssr-nullable-datetime-form-validation